Torri Edwards (L-R) sprints to the finish line to win her women's 100 meters semifinal heat ahead of Mechelle Lewis, Shalonda Solomon and LaShaunte'a Moore at the U.S. Olympic Track and Field Trials in Eugene, Oregon June 28, 2008. REUTERS/Jason Reed (UNITED STATES) (BEIJING OLYMPICS 2008 PREVIEW) 

Carmelita Jeter (R) and Mechelle Lewis of the U.S. perform the first exchange at the women's 4 x 100 metres relay heats at the 11th IAAF World Athletics Championships in Osaka, September 1, 2007. REUTERS/Ruben Sprich (JAPAN) 

Veronica Campbell (C) of Jamaica crosses the finish line ahead of Mechelle Lewis (L) of the U.S. and Christine Arron of France to win her women's 100 metres semi-final event at the 11th IAAF World Athletics Championships in Osaka August 27, 2007. REUTERS/Michael Dalder (JAPAN) 

Mechelle Lewis of the U.S., Christine Arron (C) of France and Sheri-Ann Brooks (L) of Jamaica run during the women's 100 metres quarter-final heats at the 11th IAAF World Athletics Championship in Osaka August 26, 2007. REUTERS/David Gray (JAPAN) 

Gold medallist Mikele Barber (R) of U.S. celebrates with her compatriot, silver medallist Mechelle Lewis at women 100m finals at the Pan American Games in Rio de Janeiro July 24, 2007. REUTERS/Daniel Munoz (BRAZIL) 

Gold medallist Mikele Barber (C) of the U.S. celebrates on the podium with her compatriot silver medallist Mechelle Lewis (L) and bronze medallist Chandra Sturrup of the Bahamas at the women's 100m finals at the Pan American Games in Rio de Janeiro July 24, 2007. REUTERS/Daniel Munoz (BRAZIL) 

Gold medallist Mikele Barber (R) of U.S. celebrates with her compatriot, silver medallist, Mechelle Lewis at women's 100 metre finals at the Pan American Games in Rio de Janeiro July 24, 2007. REUTERS/Daniel Munoz (BRAZIL) 

Mikele Barber (R) of the U.S. crosses the finish line ahead of her compatriot Mechelle Lewis (C) and Laverne Jones of the Virgin Islands in the 100 metre final race at the Pan American Games in Rio de Janeiro July 24, 2007. Barber won the gold and Lewis the silver. REUTERS/Carlos Barria (BRAZIL) 

Mikele Barber (C) of the U.S., her compatriot Mechelle Lewis (R) and Chandra Sturrup of the Bahamas cross the finish line to win gold, silver and bronze respectively in the 100m finals at the Pan American Games in Rio de Janeiro July 24, 2007. REUTERS/Daniel Munoz (BRAZIL) 

Mechelle Lewis (R) of the U.S. races with others in their women's 100m heat at the Pan American Games in Rio de Janeiro July 23, 2007. REUTERS/Carlos Barria (BRAZIL)